21591765

素因数分解:

$3^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1367}}^1$

素因数の和:1400

約数の個数: 48

約数和(自身を含む): 41827968

約数和(自身を除く): 20236203

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 81, 117, 135, 195, 243, 351, 405, 585, 1053, 1215, 1367, 1755, 3159, 4101, 5265, 6835, 12303, 15795, 17771, 20505, 36909, 53313, 61515, 88855, 110727, 159939, 184545, 266565, 332181, 479817, 553635, 799695, 1439451, 1660905, 2399085, 4318353, 7197255, 21591765]

約数ペア:

[(1, 21591765), (3, 7197255), (5, 4318353), (9, 2399085), (13, 1660905), (15, 1439451), (27, 799695), (39, 553635), (45, 479817), (65, 332181), (81, 266565), (117, 184545), (135, 159939), (195, 110727), (243, 88855), (351, 61515), (405, 53313), (585, 36909), (1053, 20505), (1215, 17771), (1367, 15795), (1755, 12303), (3159, 6835), (4101, 5265)]